public class Date {
    public int year = 1900;
    public int month = 1;
    public int day = 1;
    public Date(){
    }

    public Date(int year, int month, int day) {
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public void main(){

    }

    public static String classroom = "117";

    public static String getClassroom() {
        return classroom;
    }
}